Journal ArticleDOI
Influence of microstructural aspects on impact toughness of multi-pass submerged arc welded HSLA steel joints
TLDR
In this article, a multi-pass submerged arc welding was performed on the HSLA steels using multi-microalloyed electrodes in the present work, and three different heat input processes were employed to investigate the microstructure evolution and corresponding mechanical properties of weldments.About:
This article is published in Materials & Design.The article was published on 2016-01-15. It has received 96 citations till now. The article focuses on the topics: Heat-affected zone & Submerged arc welding.read more
Citations
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Revisiting fundamental welding concepts to improve additive manufacturing: From theory to practice
TL;DR: In this article, a unified equation to compute the energy density is proposed to compare works performed with distinct equipment and experimental conditions, covering the major process parameters: power, travel speed, heat source dimension, hatch distance, deposited layer thickness and material grain size.
Journal ArticleDOI
Investigation on microstructure evolution and properties of duplex stainless steel joint multi-pass welded by using different methods
TL;DR: In this paper, the microstructure, impact toughness, and pitting corrosion resistance of duplex stainless steel (DSS) welding joints fabricated by using gas tungsten arc welding (GTAW) and flux-cored arc welding with different shielding gas compositions were investigated.
Journal ArticleDOI
Hydrogen permeation and embrittlement susceptibility of X80 welded joint under high-pressure coal gas environment
TL;DR: In this paper, a microstructural analysis was performed on X80 base metal, weld metal, and coarse-grained heat-affected zone (CGHAZ) for hydrogen embrittlement susceptibility.
Journal ArticleDOI
Effect of welding heat input on grain boundary evolution and toughness properties in CGHAZ of X90 pipeline steel
TL;DR: In this paper, the simulated coarse-grained heat-affected zones (CGHAZs) of X90 pipeline steel were produced using a Gleeble 3500 simulator under different heat inputs (HIs) varying from 10 to 50kJ/cm.
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Hydrogen trapping and hydrogen induced cracking of welded X100 pipeline steel in H2S environments
TL;DR: In this paper, the hydrogen induced cracking susceptibility of welded X100 pipeline steel was evaluated in NACE “A” solution at room temperature according to the NACE TM0284-2011 standard and the results showed that the welded joint with an inhomogeneous microstructure had a higher trap density and more susceptible to HIC due to two orders of magnitude larger in the concentration of irreversible hydrogen than that of base metal, though all presenting poor HIC resistance for both base metal and welded joints.
References
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Journal ArticleDOI
The nature of acicular ferrite in HSLA steel weld metals
TL;DR: In this paper, the nature of the fine interlocking acicular ferrite microstructure in HSLA steel weld metals is investigated and it is shown that the active nucleation sites for this ferritic product are weld metal inclusions.
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Austenite to bainite phase transformation in the heat-affected zone of a high strength low alloy steel
TL;DR: In this article, the authors investigated the austenite to bainite phase transformation in a low alloy structural steel after simulated welding heat treatment, by means of light microscopy, electron backscatter diffraction and transmission electron microscopy.
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Effects of microstructure on cleavage fracture stress in steel
D. A. Curry,J. F. Knott +1 more
TL;DR: In this paper, it was shown that there is a general relationship between the ferrite grain size and the size of the largest carbide particle in mild steels which are simply cooled after austenitization.
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Cleavage initiation in the intercritically reheated coarse-grained heat-affected zone: Part I. Fractographic evidence
Claire Davis,Julia King +1 more
TL;DR: In this paper, the authors used tensile, crack opening displacement (COD), blunt notch, and charpy impact tests to investigate cleavage initiation in the intercritically reheated coarse-grained heat affected zone (IC CG HAZ) of three steels.
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Effect of inclusion size on the nucleation of acicular ferrite in welds
TL;DR: In this paper, the effect of inclusion size on the formation of acicular ferrite lath was examined to understand the role of inclusion in the nucleation of the lath, and it was demonstrated that larger inclusions are indeed more potent nucleation sites when compared with those of smaller size.